fcdee2cf79eaf19e606c077ea5f5b3244976f8d595a5650da18448fa05a78e02

Analysis

max time kernel
147s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
25/04/2024, 04:20

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General

Target

2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe
Size

71KB
MD5

86a2089f6fe1947051453c55fdc3e99c
SHA1

129ffd88c09da22faf46e572936e402f9c7ee22c
SHA256

fcdee2cf79eaf19e606c077ea5f5b3244976f8d595a5650da18448fa05a78e02
SHA512

9fefdea9157186d25315ea0a2f22c7ef691bddf3a04b6e71102c07175e82f4d0436c848e98d03eb77002a2c72d1a026306fbb62aaa80db60a23b3820f1b4a0cb
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTp:ZhpAyazIlyazTp

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4500	CTS.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4460	2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe
Token: SeDebugPrivilege	4500	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4460 wrote to memory of 4500	4460	2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe	89
PID 4460 wrote to memory of 4500	4460	2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe	89
PID 4460 wrote to memory of 4500	4460	2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4460
- C:\Windows\CTS.exe
  "C:\Windows\CTS.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - Suspicious use of AdjustPrivilegeToken
  PID:4500

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
395KB

MD5
fd7bcd736c2e766427c241f571afa8c7

SHA1
ab00e8cabd340812f2620f3048a57f75f4363684

SHA256
29e68beddf6d79081ea76b1c0a4086efa52859ca6ed7a32352b360d8c7fee3ef

SHA512
e6742fb08c157756e78d57a34fafc54a1c61011f8facc0686f880ce820c0e0e7d01afab502e7d52006feea8ff65a610809eaf91bb71ac17587d8785e14ea55c4

Download Submit
C:\Users\Admin\AppData\Local\Temp\c34aMUZrihqgnG7.exe

Filesize
71KB

MD5
28e5e47ecaee8463aa317a9c72ed01e3

SHA1
e952707ad6a24b014bd0249c341144b33df095de

SHA256
fd3ce1793f316cfe3412488891923e827fc557e4b583c796f575b8f9ab383b70

SHA512
3c6db1991266963baccce9f891416ff0ac8c21353678950ff5ceb0961ce22242f4645b8576b6ad7bfa9d8a212b9248c6913314633a6fe59271b7b8f0473ee6b8

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads